Brake for power-driven vehicles.



PATENTED DEC. 17; 1907.

J. NQMAHONEY.

BRAKE FOR POWER DRIVEN VEHICLES APPLICATION FILED 0o1'.-ao.1a05.

2 SHEETS-SHEET 2.

JOSEPH N. MAHONEY,

* STATES PATENT ornrcn.

OF BROOKLYN, NEW YORK, AS ST GNOR TO HIMSELF, JAMES D. LEYS, AND SAMUEL JACOBSON, OF NEW YORK, N. Y.

1mm non POWER-DRIVEN vEmcL s.

} Specification bf Letters Patent.

Application filed October 30.1905. Serial No. 284,987.

To all whom it may concern:

-Be it known that I, Josnrn NATHANIEL ,MA ONEY, a citizen of the United States of America, residin in the boron h of Brooklyn, county of ings, State New York, have invented certain new and useful Improvements in Brakes for Power-Driven Vecles, iof which the following is a specifica-.

tion. I

Thisinvention relates to a vehicle brake having a sprlng under tension whose reactlon tends constantly to apply the brakes, a motor that imposes further tension on the spring to draw the brakes out of action, and retaining devices that hold the sprin under such further tension and are control able to permit abrupt or graduated application of the brakes bythe reaction of the spring, the motor .being controllable also to effect gradual release ofthe brakes.

This invention comprises a non-reversing gear or driving connection, of any appropriate characteninterposed between the-mo:

- tor anguthe brake spring u 'on which it im poses rther tension to re ease the. brakes,

and a controllable clutch de'vicefof any suit 7 able character, interposed between the s rin and such. driving connection. When, tiiere ore, the clutch is ineffective operation theenergy of'the motor is exerted through it and s'ald driving connection to compress the' spring'jand release the'brakes. ,When the brakes; are to be applied the motormaii'cbn trols the clutch to permit reaction of-the spring to apply the brakes without reverse movement of the ,motor. This makes permissible the l use of a rotary motor that is actuated errevolvediin. one direction only and that to release the brakes.

In he orgamzation herein illustrated the non-reversing driving connection is a wormnetic. The invention is "not limited gearfof; suitablepitch: and the clutch is magto, these special styles ofdevices.

In the itccompanying' drawings: Figure-1- is 'afdiagrammatic lanshowing the invention applied to an e eetrically propelled car;

Fig. 2-, a dis. ammatic elevatlon indicating three couple units or cars; Fig. 3 a longitudinal section through the brake applying and.

controlling devices'on the line '3, 3, of Fig. 4: Fig. '4 a transverse section on the line '4, 4,-of Figffizand Fig. 5-a section on line 5; 5, of

(4. 3", r A pr g-@- under fixed normal tension sertion and withdrawal of the resistance.

like manner release of the brakes. may be controlled by quick 0 ening andclosing of tends constantly, by the strain it exerts upon a draw bar b, to apply the brake. shoes to the car wheels. The system of brake. levers Patented Dec. 17,119o7.

shown is common and no description thereof is needed. J

. Appropriately mounted beneath the car body 1s a frame carqing a rotary electric mo tor 0 having on its s aft a worm d engaging a 'worm-wheel e loose on the shaft e carrying a 'pinionf-engagmg a rack b onthe draw-bar e The 001 pring a is inclosed in a easing into which and through the spring extends the draw-bar which is hollowedout and tapped to receive a threaded bolt 1; the head of which bears a ainst a'plate 12 between it and theend of t e spring. The end of the casing'is closed by a screw cap." By setting in the bolt I) desired initial tension is imposed upon the spring which by 'its reaction .s ring a, which, as imposed," is retained after t e motor circuit is o ened, inthe particular embodiment of this lnvention shown in the drawings, by the non-reversible gear and clutch. Since the circuit of the clutch is first closed andthen that of the motor, the increased tension imposed upon the brake spring by themotor will be retained and the motor circuit is 0 one To apply the brakes the circuit o the motorbei rg open the circuit of the clutch is resistance-introduced into i .to effect inst eti ther opened or a brake shoes-held out of o eration when the;

radual application of the brakes/"The uick. mtermittent opening ."and closing of operation may be also controlled by.

t e clutch circuit; or by quick alternate inthe" motor circuit. e shaft e'- is shown hollow and the. terminal wires g, g ofthe clutch winding are taken out thro h it.

This apparatus may be contro ed from-a brake controller at either end of'tlie car as 1 10 nation of a brake spring under tension tending to apply the brakes, a motor adapted to impose increased tension upon the spring to reheve the brakes, an operative connection between the spring and motor comprising a non-reversi driving connection and a clutch, a bra e controller, its motor circuit connections and contacts and means whereby on the actuation ofthe brake controller staff the clutch is first put into efiective operation to transmit the power of the motor and retain any increased tension impose upon the brake spring and then the motor circuit is closed.

9. In vehicle brake mechanism, the com'bination of a brake spring under tension tendto apply the brake,ja motor adapted to impose increased tension upon the spring to relieve the brakes, an operative connection between the spring and motor comprising a non-revers' driving; connection -and a clutch, a bra e contro er, its motor circuitconnections and contacts and means where-' by on the actuation of the brake' controller staff the clutch is first'put into efiective operation to transmit the power of the motor and retain any increased tension imposed upon the brake spring and then the motor circuit is closed and means independent of the controller acting automatically toopen the motor circuit when maximum tension is imposed on the spring and close the circuit at suchbreak on reduction of such maximum tension. c 1 4 10." In vehicle brake mechanism, the com bination of a brake spring under tension tend ing to apply the brakes, a motor adapted to .1mpose increased tension upon the spring to reheve' the brakes, an operative connection between the spring and motor-comprising a non-reversing driving-connection and an electro magnetically controlled clutch, a brake controller, its 'motor circuit-connections and contacts, its clutch-circuit connec 'tions and contacts: and means whereb on the actuation of the brake controller sta the clutch circuit is first closed to put the clutch into effective operation to transmit the power of the motor and retain any increased tension imposed upon the brakespring andthen the motor circuit is closed.- 11. In vehicle brake mechanism, the-combination of a brake s ring under tension tending] to apply the brakes, a motor adapted to impose increased tension upon the spring to reheve the brakes, an operative connection between the spring and motor comprising a non-reversm dnvm connection and a clutch, abra e contro le'r, its motor circuit connections and contacts and means whereby on the actuttion of the brake controller staff the clutch is first put into effective operation to trsnsmit the power of the'motor sud retain any increased tension: imposed upon the brake spring snd then the motor circuit 7 Organized to is closed and on partial reverse movement the motor circuit is opened and on further clutch, a brake controller, its motor circuit connections and contacts and means where by onthe actuation of the brake controller staff the clutch is first put into effective operation to transmit the power of the motor and retain any increased tension imposed upon the brake "spring and then the 'motor circuit is closed and on partial reverse movement the motor circuit is opened and on further reverse movement the clutch may be controlled to permitdesired application of the brakes by the spring and means acting independently of the controller to open the motor circuit when maximum tension has been imposed upon the sprin and to close s I o a s such, break 1n the circuit on reduction oirsuch maximum tension.

In vehicle brake mechanism, the combi'nation of a brake spring under tension tending to apply the brakes, a. rotary motor an operative connection between the spring and motor comprising'a non-reversing driveing connection, and power actuated clutch devices interposed between the non-reversing connection and spring under the control of the motorman; W imposed upon the spring bythe action of the motor to release the brakes may be relieved by mampulation of the power-clutch controllingbrakes. I

14. In vehicle brake. mechanism, the combination of abrake spring under tension evices to permit-application of the tending to apply the. brakes, a rotary electric motor or anized to be run in one direction only, an an operative connection between the spring and motor comprising a non-reversin driving connection, and power actuated c utch devices interposed between the e run in one direction only, and e ere by further tension non-reversing connection and spring under the control of the motorman; whereby furthertension imposed upon the sprin by the action of the motor to release the bra es may be relieved b manipulation of the powerelutch contro 'ng-devices to permit application of'the brakes.

' In testimony whereof, I have hereunto subscribed my name.

JOSEPH N. Witnesses:

Enwmn C. DAVIDSON,

Ka'rnsnmn MAOMAIION. 

